direct fluorescent antibody

(redirected from Direct flourescent antibody)

direct fluorescent antibody

Abbreviation: DFA
A fluorescent antibody test performed on sputum to detect microorganisms that invade the respiratory tract, e.g., Legionella, Mycoplasma, or Bacillus anthracis.
Synonym: direct fluorescein-conjugated antibody; direct immunofluorescence test
See also: antibody
References in periodicals archive ?
On July 11, an 8-year-old unvaccinated boy developed a maculopapular rash diagnosed clinically as varicella and confirmed by direct flourescent antibody test on July 23.
Multiple swabs increase the positivity rate of detection.[3] Culture toxicity due to contamination decreases as the number of specimen collections increases.[3] Elevated serum antibody titers to C trachomatis, recent patient treatment with antibiotics, culture inoculation delay, and improper thermal transport or storage conditions affect culture outcome.[5] Chlamydial cell culture technique has been refined and improved by the use of direct flourescent antibody confirmation, cycloheximide pretreatment of McCoy cells, and the use of shell vials and nontoxic collection materials.[2]
A direct flourescent antibody test method was used to resolve discrepancies when the immunoassay was positive and the culture was negative.

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